Super simple theme

PuleExampleTheme.css

body,
html {
    margin: 0;
    background: #f5f5f5;
}
body > p {
    text-align: center;
}
.application-heading {
    background: #3f51b5;
    border-bottom: 1px solid #3949AB;
    text-align: center;
}
.application-heading a {
    color: white;
    text-decoration: none;
    display: inline-block;
    padding: 7px 13px;
    vertical-align: middle;
}
.application-heading a img.robot_face {
    display: inline-block;
    position: static;
    width: 30px;
    vertical-align: middle;
    margin-right: 7px;
}
.container {
    max-width: 1200px;
    margin: 40px auto;
    background: white;
    padding: 10px 15px;
    border-radius: 2px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
}
iframe {
    width: 100%;
}